EP 1112976 B1 20070711 - Process for cooling an optical fibre during drawing
Title (en)
Process for cooling an optical fibre during drawing
Title (de)
Verfahren zum Kühlen einer optischen Faser während des Ziehens
Title (fr)
Procédé de refroidissement d'une fibre optique en cours de fibrage
Publication
Application
Priority
FR 9916723 A 19991230
Abstract (en)
[origin: EP1112976A1] The optical fibre cooling procedure, using a cooling fluid in at least one cooling zone, consists of a rapid cooling stage, i.e. cooling the initial fibre at a rate faster than the ambient air, followed by a slow cooling stage, in which the fibre is cooled at a slower rate than the ambient air. In the rapid cooling stage the initial temperature of 2000-1500 degrees C for silicon glass fibres, 450 - 250 degrees C for fluoride glass fibres and 250 - 175 degrees C for polymer-based fibres is reduced to 1700-1200, 400-200 and 225-75 degrees C respectively. In the slow cooling zone the above temperatures are reduced to 1500-700, 350-25 and 200-25 degrees C respectively. In each of the cooling zones the temperature profile is arranged so that the outside temperature is as high as possible and the core temperature as low as possible.
IPC 8 full level
C03B 37/027 (2006.01); B29D 11/00 (2006.01); C03B 37/023 (2006.01)
CPC (source: EP US)
C03B 37/0235 (2013.01 - EP US); C03B 37/02718 (2013.01 - EP US); C03B 2205/55 (2013.01 - EP US); C03B 2205/56 (2013.01 - EP US); Y02P 40/57 (2015.11 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1112976 A1 20010704; EP 1112976 B1 20070711; AT E366715 T1 20070815; CN 1204071 C 20050601; CN 1301675 A 20010704; DE 60035478 D1 20070823; DE 60035478 T2 20071213; DK 1112976 T3 20070806; DK 1112976 T5 20070924; FR 2803287 A1 20010706; FR 2803287 B1 20020531; JP 2001192228 A 20010717; JP 4990429 B2 20120801; US 2001006262 A1 20010705; US 6565775 B2 20030520
DOCDB simple family (application)
EP 00403389 A 20001204; AT 00403389 T 20001204; CN 00135587 A 20001220; DE 60035478 T 20001204; DK 00403389 T 20001204; FR 9916723 A 19991230; JP 2000400306 A 20001228; US 73650000 A 20001215